broken sink

Last

night my kitchen sink started backing up. I called the plumbing company and a plumber came in the afternoon, an older man who was sweating a lot and did not have the right equipment. But he struggled and swore at the pipes, he borrowed stuff from me and in the end couldn't fix it. By the time he left he was covered with dirty pipe water from the pipe he had opened. Monday morning, he said, he would be back and do it right. I don't know, should I trust this.